audio: improve aspects of EOF handling

The code actually kept going out of EOF mode into resync mode back into
EOF mode when the playloop had to wait after an audio EOF caused by the
endpts. This would break seamless looping (as added by the next commit).

Apply endpts earlier, to ensure the filter_audio() function always
returns AD_EOF in this case.

The idiotic ao_buffer makes this an amazing pain in the ass.

2 files changed, 7 insertions, 0 deletions

diff --git a/audio/filter/af.c b/audio/filter/af.c
index a132965295..f380459747 100644
--- a/audio/filter/af.c
+++ b/audio/filter/af.c
@@ -779,6 +779,12 @@ struct mp_audio *af_read_output_frame(struct af_stream *s)
     return af_dequeue_output_frame(s->last);
 }
 
+void af_unread_output_frame(struct af_stream *s, struct mp_audio *frame)
+{
+    struct af_instance *af = s->last;
+    MP_TARRAY_INSERT_AT(af, af->out_queued, af->num_out_queued, 0, frame);
+}
+
 // Make sure the caller can change data referenced by the frame.
 // Return negative error code on failure (i.e. you can't write).
 int af_make_writeable(struct af_instance *af, struct mp_audio *frame)
diff --git a/audio/filter/af.h b/audio/filter/af.h
index 697024b781..a773f561b3 100644
--- a/audio/filter/af.h
+++ b/audio/filter/af.h
@@ -148,6 +148,7 @@ void af_add_output_frame(struct af_instance *af, struct mp_audio *frame);
 int af_filter_frame(struct af_stream *s, struct mp_audio *frame);
 int af_output_frame(struct af_stream *s, bool eof);
 struct mp_audio *af_read_output_frame(struct af_stream *s);
+void af_unread_output_frame(struct af_stream *s, struct mp_audio *frame);
 int af_make_writeable(struct af_instance *af, struct mp_audio *frame);
 
 double af_calc_delay(struct af_stream *s);